Coast, has a display of Sumatran tigers, and money from visitor donations and from their 'tiger walk' goes to Sumatra to assist in-situ conservation of wild tigers. Quality interpretation A good wildlife guide will impart a deeper understanding of the local wildlife and its ecological needs, which may give visitors a more informed base on which to subsequently modify their behaviour (e.g. not throw out plastic bags that may be eaten by turtles) and decide what political moves to support. Culls and Population Maintenance In order to provide for less invasive wildlife tourism features and maintain ecosystem health, wild populations occasionally require maintenance measures. These measures can include the aforementioned conservation breeding programs to bolster population numbers, or culls to reduce population numbers. Population reduction via culls occurs not only through the obvious means of direct (fatal) removal of individuals, but by implementing an additional selective pressure upon the population. This “harvest selection” can alter allelic frequency (a measure of genetic diversity, and thus related to genetic health) within a population, allowing the hunters to shape future generations by hunting the current. Conservation Hunting/Harvest "Well monitored trophy hunting is inherently self-regulating, because modest off-take is required to ensure high trophy quality and thus marketability of the area and future seasons". For example in Zimbabwe trophy hunting was largely responsible for the conversion of 27,000 km2 of livestock ranches to game ranching and a subsequent quadrupling of wildlife populations. In South Africa there are approximately 5000 game ranches and 4000 mixed livestock/game ranches with a population of >1.7 million wild animals, presently 15-25% of ranches are used for wildlife production Anti-poaching Bringing tourists regularly into some areas may make it more difficult for poachers of large animals or those who collect smaller species for the black market. Some examples of tourism having a positive effect towards anti-poaching, are that of non-consumptive wildlife tourism services which in turn provide for economic benefit of rural communities, and also by providing these same local communities with game meat harvested through tourist activities such as hunting. Barrett and Arcese (1998) show that generating money sources from these non-consumptive practices of tourism generate a positive income effect and decrease game meat consumption while lowering illegal hunting (poaching) Wildlife Tourism Australia Inc. held a workshop on this theme in June 2017: Illegal Wildlife Trafficking: Attacking on All Fronts. There is a report on discussions, plus links to